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부품번호 | AT1309 기능 |
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기능 | Micro-Power Step up DC-DC Converter | ||
제조업체 | Aimtron Technology | ||
로고 | |||
전체 14 페이지수
www.DataSheet4U.com
AT1309
Preliminary Product Information
Micro-Power Step up DC-DC Converter
Feature
•Operating Voltage:2.5V to 6.0V.
•High Operating Frequency: 1.4MHz
•High Output Voltage: Up to 28V
•Shutdown Current <1µA
•Digital Dimming Control.
•Built-in Cycle-by Cycle Current-Limiting.
•Built-in Soft-Start Function.
•±1.5% 1.23V Reference Voltage
•Tiny SOT-25 Package
Application
• STN/OLED Bias
• Personal Digital Assistants(PDAs)
• DSC
Description
The AT1309 step-up converter is designed for small
or medium size LCD panel of high bias voltage with
a constant current to provide PDAs, and other
hand-held devices. It features a fast 1.4 MHz
current-mode PWM control with a built-in 0.3Ω
N-MOS that allows for smaller capacitor and
inductor. Fault condition protection uses cycle-by
-cycle current limiting to sense maximum inductor
current and thermal protection. Also included
soft-start eliminates inrush current during start-up.
The AT1309 is available in 5-pin SOT-25 packages.
Block Diagram
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/2/2006 REV:1.1
Email: [email protected]
1
AT1309
Preliminary Product Information
Micro-Power Step up DC-DC Converter
Electrical Characteristics
Parameter
Symbol
(VIN=2.5V, Ta=+25 , unless otherwise noted)
Test Condition
Min. Typ. Max. Units
Operating V IN Range
VIN VIN input Voltage
2.5 - 6.0 V
Under Voltage Thershold
UVLO
Switch- Off Input Current
IIN1
Shutdown Current
IIN3
Feedback Reference
VFB
FB Input Bias Current
IFB
Output Voltage Line Regulation
VIN falling, 100mV hysteresis 2.1 2.2 2.3
No Switching
- 100 120
EN=0V
- -1
1.212 1.230 1.248
VFB =0.2V
2.5V< VIN <6.0V
- -1
- 0.1 -
V
µA
µA
V
µA
%
Switching Frequency
Maximum Duty
Soft-Start charging time
fOSC
DMAX
tSS
- 1.4
- 90
- 0.5
- MHz
-%
- ms
Switching Current Limit
ILX VIN=3.0V,duty cycle=80%
- 1.0 - A
LX ON Resistance
LX Leakage Current
EN Input Current
EN Input Level
EN low Shutdown Delay
Thermal Shutdown
RLX
ILeakage
IEN
VIH
VIL
ILX =350mA
VLX =28V, EN=0V
EN=5V
0.1V hysteresis
- 0.3 -
- - 1 µA
- - 8 µA
2.0 - - V
- - 0.8 V
- 4 - ms
- 120 -
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/2/2006 REV:1.1
Email: [email protected]
4
4페이지 AT1309
Preliminary Product Information
Micro-Power Step up DC-DC Converter
Start up Waveform with Load
VIN=3.0V, Vout=15V, L=10uH, Iout=100mA
Ch1:Vout, Ch2:EN, Ch3:IIN, Time:5ms/div
LX Switching Waveform
VIN=3.0V, Vout=15V, L=10uH
Ch1:LX, Ch3:ILX, Time:0.5us/div
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/2/2006 REV:1.1
Email: [email protected]
7
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